- 압축잔류응력이 스프링강의 고온환경 피로균열 진전거동에 미치는 영향
- ㆍ 저자명
- 정찬기,박경동
- ㆍ 간행물명
- 韓國海洋工學會誌
- ㆍ 권/호정보
- 2002년|16권 5호|pp.73-79 (7 pages)
- ㆍ 발행정보
- 한국해양공학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
In this paper, the effect of the compressive residual stresses was obtained at the test conditions of the higher temperature than the ambient temperature. The examination was performed with the CT specimen result of the material(JISG SUP9) which is being commonly used for the marine engine parts and the ocean structures. As a result, the test conditions at the higher temperature were acquired considering the peak values of the compressive residual stresses of the specimens and the effect on the fatigue crack propagation speed da/dN in stage II and the threshold stress intensity factor range Δth in stage I. Also the material constant C and the fatigue crack propagation index m in the formula of Paris Law da/dN=C (ΔK)$^{m}$ were suggested to estimate the dependence on the test temperature.